Pgx

This is the third part of the pgx v5 series. Let’s discuss the new features from the title. CollectRows and RowToStructByName CollectRows allow us to fetch an array of rows and set them into a slice of structs. Further, RowToStructByName is a long awaited feature which allows to store a row into a struct. sqlx module became very popular in Go community exactly for this reason, but pgx now supports something similar....

In this second part of the pgx v5 series, we are going to discuss the QueryRewriter interface and NamedArgs. Let’s first check out the signature of the Exec method of the pgxpool.Pool struct. 1 2 3 4 5 // Exec acquires a connection from the Pool and executes the given SQL. // SQL can be either a prepared statement name or an SQL string. // Arguments should be referenced positionally from the SQL string as $1, $2, etc....

Go has very rich standard library which also contains database/sql module with generic interface over SQL databases. Further, lib/pq PostgreSQL driver is fully compatible with database/sql and provides all basic database operations. However, since this is generic implementation over all supported databases, using it is a trade-off not supporting some PostgreSQL specific features. Fans of PostgreSQL (in further text pg) may want more and here comes pgx in help. pgx is a very rich pg driver supporting LISTEN / NOTIFY, COPY, type mapping between pg and Go, all specific pg types, wire protocol and much more....